* StaticCastSharedRef() - Static cast utility function, typically used to downcast to a derived type. * ConstCastSharedRef() - Converts a 'const' reference to 'mutable' smart reference * StaticCastSharedPtr() - Dynamic cast utility function, typically used to downcast to a derived type....
the stack or calling delete) if getRefCnt() > 1.*/classSK_API SkRefCntBase {public:/** Default construct, initializing the reference count to 1.*/SkRefCntBase() : fRefCnt(1) {}/** Destruct, asserting that the reference count is 1.*/virtual~SkRefCntBase() { #ifdef SK_DEBUG SkASSE...
* TSharedFromThis - You can derive your ownclassfromthistoacquire a TSharedReffrom"this"* StaticCastSharedRef() -Staticcast utilityfunction, typically usedtodowncasttoa derived type. * ConstCastSharedRef() - Converts a'const' reference to 'mutable' smart reference* StaticCastSharedPtr() - ...
这两个的区别只有传入到 std::thread 的 lambda 的捕获类型,一个是 capture by copy, 后者是 capture by reference,哪个会有线程安全问题呢? 根据刚才的两个结论,显然例 1 是没有问题的,因为每个 thread 对象都有一份 test 的 copy,因此访问任意成员函数都是线程安全的。 例 2 是有数据竞争存在的,因为所有...
} public static Bitmap byteToBitmap(byte[] imgByte) { InputStream input = null; Bitmap bitmap = null; BitmapFactory.Options options = new BitmapFactory.Options(); options.inSampleSize = 8; input = new ByteArrayInputStream(imgByte); SoftReference softRef = new SoftReference(BitmapFactory....
【Different shared_ptr instances can be "written to"(accessed using mutable operations such as operator= or reset) simultaneouslyby multiple threads (even when these instances are copies, and share the samereference count underneath.) 】 3. 任何其他并发访问的结果都是无定义的。【Any other ...
// CLASS _Ref_count_base class __declspec(novtable) _Ref_count_base { // common code for reference counting private: virtual void _Destroy() noexcept = 0; // destroy managed resource virtual void _Delete_this() noexcept = 0; // destroy self _Atomic_counter_t _Uses = 1; _Atomic_cou...
内部持有了 private 的 weak_ptr 指针__weak_this_:mutable weak_ptr<_Tp> __weak_this_\ shared_from_this()直接返回的是shared_ptr<_Tp>(__weak_this_), 并不是__weak_this_.lock(), 原因是前者如果__weak_this_如果为空,将会抛出异常,后者会返回一个存储nullptr的std::shared_ptr对象。
Before this change the code used to count references to CNode objects manually via CNode::nRefCount. Unneeded CNodes were scheduled for deletion by putting them in CConnman::m_nodes_disconnected and were deleted after their reference count reached zero. Deleting consists of calling PeerManager::Fi...
To avoid this, we need to keep a reference to the fixture when we create it and we need to make it possible for all the tests to access the reference. Variation: Per-Run Fixture The simplest form of Shared Fixture is the Per-Run Fixture where we set up the fixture at the beginning ...